01: /* ===========================================================
02: * JFreeChart : a free chart library for the Java(tm) platform
03: * ===========================================================
04: *
05: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
06: *
07: * Project Info: http://www.jfree.org/jfreechart/index.html
08: *
09: * This library is free software; you can redistribute it and/or modify it
10: * under the terms of the GNU Lesser General Public License as published by
11: * the Free Software Foundation; either version 2.1 of the License, or
12: * (at your option) any later version.
13: *
14: * This library is distributed in the hope that it will be useful, but
15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17: * License for more details.
18: *
19: * You should have received a copy of the GNU Lesser General Public
20: * License along with this library; if not, write to the Free Software
21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22: * USA.
23: *
24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25: * in the United States and other countries.]
26: *
27: * -------------------
28: * TickUnitSource.java
29: * -------------------
30: * (C) Copyright 2003, 2004, by Object Refinery Limited.
31: *
32: * Original Author: David Gilbert (for Object Refinery Limited);
33: * Contributor(s): -;
34: *
35: * $Id: TickUnitSource.java,v 1.2.2.1 2005/10/25 20:37:34 mungady Exp $
36: *
37: * Changes
38: * -------
39: * 23-Sep-2003 : Version 1 (DG);
40: *
41: */
42:
43: package org.jfree.chart.axis;
44:
45: /**
46: * An interface used by the {@link DateAxis} and {@link NumberAxis} classes to
47: * obtain a suitable {@link TickUnit}.
48: */
49: public interface TickUnitSource {
50:
51: /**
52: * Returns a tick unit that is larger than the supplied unit.
53: *
54: * @param unit the unit.
55: *
56: * @return A tick unit that is larger than the supplied unit.
57: */
58: public TickUnit getLargerTickUnit(TickUnit unit);
59:
60: /**
61: * Returns the tick unit in the collection that is greater than or equal
62: * to (in size) the specified unit.
63: *
64: * @param unit the unit.
65: *
66: * @return A unit from the collection.
67: */
68: public TickUnit getCeilingTickUnit(TickUnit unit);
69:
70: /**
71: * Returns the tick unit in the collection that is greater than or equal
72: * to the specified size.
73: *
74: * @param size the size.
75: *
76: * @return A unit from the collection.
77: */
78: public TickUnit getCeilingTickUnit(double size);
79:
80: }
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